Answer :

All the measurements that we do have errors. We cannot remove errors completely but reduce it.

There can be three main causes of errors in measurement:

Defect in instrument can lead to error in measurement. Different instruments can have little differences. So, they can cause errors.

Incorrect method of measurement: They may not have followed the correct methods of measurement like keeping eyes in straight line to the measuring point.

Use of different scales: They might have used different scales. So they could have different readings.

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